With this setting you can hide the extension of Microsoft Word Document (.DOC) files. If you have a file for example “Work.doc”, you can hide the extension that it looks like “Work”.

For this, go to Start > Run menu, enter “regedit” and navigate to the registry path listed below. Now, create a String value “NeverShowExt”, if this value does not exist, and leave the data blank. This hides the extension for the file.